op winnipeg



Dec. 3, 1929. J. c. ORR

DAMPER CONSTRUCTION Filed Jan. 5, 1928 l] HI Kill! Patented Dec. 3, 1929UNITED STATES PATENT OFFIOE JAMES C. ORR, OF WINNIPEG, MANITOBA, CANADA.ASSIGNOB TO WILLIAM JOHN CHRISTIE, 0F WINNIPEG, CANADA DAMPERCONSTRUCTION Application filed January 5, 1928, Serial No. 244,740, andin Canada January 3, 1928.

The invention relates to improvements in damper construction and anobject of the inveution is to provide a pipe sect-ion insertible withina smoke pipe and which is provided with an internal, damper controlled,return flow passage whereby the products of combustion can be retardedin their movement through the section and caused to travel in acircuitous path with the result that considerable heat is radiatedinstead of being lost up the flue or smoke stack.

A further object of the invention is to provide also a check damper tocontrol the velocity of the draft through the passage.

A more specific object is to provide a pipe section having an openended, centrally located, longitudinally extending passage thereinformed by cross plates within the section, the ends of the plates beingin staggered relation and dampers at the ends of the plates which whenclosed will cause a back flow of the products of combustion through thepassage prior to escaping to the flue.

With the above more important objects in View, the invention consistsessentially in the arrangement and construction of parts hereinaftermore particularly described, reference being had to the accompanyingdrawing in which Fig. 1 is a side view of my invention.

Fig. 2 is a vertical sectional View at 22 Figure 1.

Fig. 3 is a vertical sectional view at 3-3 Figure 2.

Fig. l is an enlarged detailed horizontal sectional view at 4l l Figure2.

In the drawing like characters oi reference indicate corresponding partsin the several figures.

In carrying out my invention, I utilize a pipe section 1 oi": thecustomary type which is adapted to be inserted in the smoke pipe leadingfrom a heater such as a stove, furnace or the like.

The pipe section is provided with an internal centrally located andlongitudinally entending passage 2 which is formed in the presentinstance by fastening two parallel spaced cross plates 3 and 4: withinthe pipe sec tion to provide the passage. The plates are herein shown asprovided at their edges with inturned flanges fastened to the pipesection by bolts 5 and the plate 4: has an inturned flange 6 at itsupper end and 3 has an inturned flange '7 at its lower end. It will beobserved that the ends 0'? the plates are in staggered relation, that isto say, the upper end of the plate 41: extends considerably above theupper end of the plate 3 and the lower end of the plate 3 extendsconsiderably below the lower end of the plate 4;.

An upper damper 8 is located in the pipe section adjoining the upper endof the plate a and overlying the upper end of the plate 3 and is carriedby a damper rod 9 of the usual type which has one end thereof formed toprovide a finger grip 10. It will be observed that the damper whenclosed or in the horizontal position as best shown in Figure 2 closesthe area between the upper end of the plate l and the right hand side ofthe pipe section and has the inner edge thereoi underlying the flange 6which acts as a stop for the damper. A lower damper 11 similar to 8 isprovided adjoining the lower end of the Plate 3 and it also is carriedby a controlling damper rod 12 and when in the closed or horizontalposition closes the area between the lower edge of the plate 3 and theleft hand side of the pipe section. The inner edge of the damper 11engages with the inturned flange 7. The damper rods are both providedwith coiled springs 13 as is usual, these restraining the turningmovement of the damper rods.

According to the above construction, it will be apparent that when thedampers are closed, I have two side passages 1 and 15 and the centralpassage 2 in the pipe section and that when the said pipe section isinserted in the smoke pipe, the products of combustion will be caused totake apath of travel in the direction as indicated by the applied arrowsin Figure 2. Obviously with the dampers set as shown, the passage 2 is areturn flow passage for the products of combustion within the secti onand the length of the said passage will be determined by the existingconditions.

The side of the pipe section containing the passage 15 is provided witha check damper 16, this being herein shown as a rotary check damper ofthe well known type. Cold air in regulated quantities can be admitted tothe passage 15 by opening the check damper a greater or less amount aswill be readily understood. If a full draft is required through thesmoke pipes, it is only necessary to turn the dampers 8 and 11 to avertical position when the products of combustion can pass withoutinterruption directly through the pipe section.

Obviously when the dampers are closed, the flow of the products ofcombustion will be retarded and they will be compelled to passdownwardly through the passage 2 before escaping to the pipe leading tothe chimney.

With this type of damper construction, I

conserve a great proportion of the heat whichunder present conditions isallowed to escape to the chimney.

W'hat I claim as my invention is The combination with a pipe section, ofa pair of centrally located spaced independent divisional platescrossing the section and extending lengthwise therein and having theiredges flanged and permanently bolted to the section and their ends instaggered relation, said plates providing a central passage and two sidepassages within the section, a normally horizontally disposed upperdamper extending between the upper end of one of the plates and the wallof the pipe section and overlying and spaced from the adjacent end ofthe other of the plates, a normally horizontally disposed lower damperextending between the lower end of the other of the plates and the wallof the pipe section and underlying and spaced from-the lower end of theother of the plates, and inturned stop flanges formed at the extendingends of the divisional plates and engageable with the dampers andstopping the dampers in their horizontal positions.

Signed at Winnipeg, this 12th day of December, 1927.

- JAMES C. ORR.

